This should be taught in middle school health class and should be revisited in high school.

“It suddenly struck me that that tiny pea, pretty and blue, was the Earth. I put up my thumb and shut one eye, and my thumb blotted out the planet Earth. I didn’t feel like a giant. I felt very, very small” - Neil Armstrong.

Zen Pencils- Carl Sagan: "The Pale Blue Dot is a photograph of Earth taken by the Voyager 1 spacecraft at a distance of billion miles away . The resulting image inspired Sagan to write this now famous and breathtaking passage.